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    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.js"></script>
    <script src="./src/page.ts"></script>
    <title>Document</title>
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    <div>使用类似webpack的打包工具，Parcel去编译运行ts项目</div>
    <div>引入了jquery.js 同时安装了它的类型文件 npm i @types/jquery</div>
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